Front

What is potential energy?

Back

Potential energy is the energy stored in an object due to its position or height. For example, a water tank at a higher elevation has more potential energy than one at a lower elevation.

Front

What happens when two objects have a negative charge?

Back

When two objects have a negative charge, they repel each other.

Front

What is a force?

Back

A force is a push or pull that can change the motion of an object.

Front

What generates heat when you rub your hands together?

Back

Friction generates heat when you rub your hands together.

Front

When do magnetic poles attract each other?

Back

Magnetic poles attract each other when one is North and the other is South.

Front

What is friction?

Back

Friction is a force that opposes the motion of an object when it comes into contact with another surface.

Front

What are the two types of forces?

Back

The two types of forces are contact forces (like friction) and non-contact forces (like gravity and magnetism).

Front

What is gravitational force?

Back

Gravitational force is the force that pulls objects toward each other, such as the force that pulls us toward the Earth.

Front

What is an example of a contact force?

Back

An example of a contact force is pushing a door open.

Front

What is an example of a non-contact force?

Back

An example of a non-contact force is the force of magnetism.